Finding the Fourth Proportional to 42,020.36, 58,002.72 and 28,592.20

Step by Step Solution

1. Step 1: Write the proportion equation
   42,020.36 : 58,002.72 = 28,592.20 : x
2. Step 2: Convert to fraction form
   42,020.36/58,002.72 = 28,592.20/x
3. Step 3: Cross multiply
   42,020.36x = 58,002.72 × 28,592.20
4. Step 4: Simplify right side
   42,020.36x = 1,658,425,370.78
5. Step 5: Solve for x
   x = 1,658,425,370.78/42,020.36
6. Step 6: Final answer
   x = 39,467.19